Thews



(No Model.)

M. MATTHEWS. LAMP Unirse Srarns Farnsir Orrrcie.

MARMADUKE MATTHEWS, OF TORONTO, ONTARIO, CANADA.

LAMP.

SPECIFICATION forming part of Letters Patent No. 311,505, dated February 3, 1885. Application filed May 23,1884. (Xo model.) Patented il: Canada June 7, 1884,No.19,504.

To all whom it may concern/:

Be it known that I, MARMADUKE MAT- THEWS, of the city of Toronto, in the county of York, in the Province of Ontario, Canada, artist, have invented certain new and useful Improvements in Fluid-Burning Lamps; and I do hereby declare that the following is a full, clear, and exact description of the same.

The object of the invention is to so construct a lamp that the top level of the oil or fluid shall always remain at the same relative distance from the burner; and it consists, essentially, in connecting the bottom of the oil-res ervoir with a compressible vessel containing AWater or other uid heavier than thc oil, and providing means by which the water or other heavy iiuid shall be forced into the oil-reservoir to take the place of the oil consumed by the burning of the lamp.

Figures l and 2 represent sectional views of a lamp provided with a compressible watervessel made bellows form. Figs. 3 and 4 show sectional views of my improved lamp, with the compressible vessel shown spherical Vin form. Fig. 5 is a sectional view of a modified form of my improved lamp.

In the drawings, like letters of reference indicate corresponding parts in each figure.

A represents the burner, rigidly connected by the wick-tube B to the oil-reservoir C. The oil-reservoir C is attached to or forms part of the lampbody D, which is made water-tight and is filled with Water.

E is a compressible vessel, made of rubber or other flexible material, and shaped in any desired form. The interior of the vessel E is connected to the interior of the oil-reservoirl C by a small hole, a, and is iilled with water or other fluid heavier than the oil or burningfluid contained within the oil-reservoir C.

F is a oat attached to the bottom of the compressible vessel E, and representing a displacement a little less than the weight of the iuids in the oil-reservoir G and vessel E; consequently when the vessel C is fu-ll of oil the compressible vessel E will be expanded, as shown in Figs. l and 3. As the oil is consumed by the burning of the lamp the weight on the iloat F will be gradually decreased, and will, in proportion to the decrease, .ascend within the lamp-body D, which, as before stated, is filled with water. This ascending of the float F will of course compress the vessel E, forcing the liquid within it out through the hole a into the reservoir C, so as to take the place Within the said vessel of the oil con sumed by the lamp. l

Figs. 2 and 4 show the float F floating in the water contained within the lamp-body D, the compressible vessels E being compressed in proportion to the height of the float Within the said body. It will be seen from this description that all the oil within the reser- -voir C may be consumed, and :also its level will be maintained at about an equal distance from the burner, thereby gaining all thev advantages secured by the maintenance of this equal distance, and also enabling the oil to be almost if not altogether consumed. The water will iiow back into the vessel E when the float is forced down to the bottom of the body D, and the oil-reservoir C may again be filled. By providing only a small hole, a, for the passage of the water from the vessel E into the reservoir C the mixing of the oil with the water by the sudden jars caused by carrying the lamp is prevented, and the water from the compressible vessel E will only flow into the oilreservoir C slowly in proportion to the consumption of the oil by the burner.

VI have shown two forms of compressible vessel E and two forms of iioat F. Other forms might easily be designed to effect the same purpose. I merely show the two to indicate that the form itself is of very little importance. In Figs. l and 2 I show the compressible vessel made in the form of a bellows, the float attached to the bellows-formed vessel being made cylindrical.

In Figs. 3 and 4 I show the compressible vessel E spherical in shape, and the float F attached to it semi-spherical.

In Fig. 5 I show a substitute for the com pressible vessel E-that is to say, instead of making the vessel itself compressible, as shown in Figs. l, 2, 3, and 4, I telescopically connect it to the oil-reservoir, and otherwise arrange it so that exactly the same effect is produced.

form the burner A and wick-tube B are, as in the other figures, rigidly connected to the oilreservoir C, which reservoir is attached to or forms part of the lamp-body D. Instead of, however, making the vessel E compressible In this substitute or equivalent IOC I t it telescopically over the reservoir C, and extend it into the lamp-body D, within which the float F, attached to the vessel E, is oated in suitable liquid. In this form of construction the oil-reservoir C is without a bottom, opening fully into the vessel E. I rst pour into the reservoir C sufficient brine or other heavy fluid to force the Boat F to the bottom of the lamp-body D, continuing to pour in the brine until the oil-reservoir is itself partially lled. I then pour the oil in on top of the brine, which Will then naturally nd its way around outside of the oil-reservoir C, between it and the vessel E, which, as shown, extends up to the top of the oil-reservoir. The effect of this operation will be that as the oil within the reservoir is consumed the brine, which is by the pressure of the oil forced to a higher point outside of the reservoir C than it reaches in the reservoir, forces the brine within the reservoir C upwardly in proportion to the consumption of the oil, so that as4 the oil consumes the brine takes its place, the Hoat F being relieved by a certain weight due to the consumption of the oil, thus maintaining the oil at an equal distance from the burner and accomplishing the same effect as produced by the arrangement shown in Figs. l, 2, 3, and 4.

I am aware that it is not new to` float a ves- -sel containing oil in a fluid, so that as the oil is consumed the vessel will be proportionately buoyed up by the surrounded fiuid, and do not broadly claim such construction.

In this application I do not broadly claim the reservoir telescoping with the wick-tube, as the same is more particularly described and claimed in another application led of even date herewith, and bearing the Serial No. 132,501.

What I claim as my invention is- 1. A wick -tube, B, having a burner, A, tted to it and connected to the oil-reservoir, in combination with a vessel, E, arranged to contain brine or other fluid heavier than oil, and provided with a float, F, supported inv fluid within a lamp-body, D, and arranged to keep the oil at about an equal distance from the burner, substantially as and for the purpose specified.

2. A wick-tube, B, connected to the oil-reservoir G, communicating with a compressible vessel, Egin combination with a float, F, contained Within the body D, and arranged to compress the vessel E by its buoyancy, sub- 55 stantially as and for the purpose specified.

Toronto, May 2l, 1884.

MARMADUKE MATTHEWS.

In presence of- CHAs. C. BALDWIN, FREDERIC BARNARD FETHERs'roNHAUGH. 

